package com.sky.service.impl;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.context.BaseContext;
import com.sky.dto.*;
import com.sky.entity.*;
import com.sky.exception.AddressBookBusinessException;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.exception.OrderBusinessException;
import com.sky.exception.ShoppingCartBusinessException;
import com.sky.mapper.*;
import com.sky.result.PageResult;
import com.sky.service.AddressBookService;
import com.sky.service.OrderService;
import com.sky.service.ShoppingCartService;
import com.sky.vo.OrderPaymentVO;
import com.sky.vo.OrderStatisticsVO;
import com.sky.vo.OrderSubmitVO;
import com.sky.vo.OrderVO;
import com.sky.websocket.WebSocketServer;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;
import org.springframework.util.CollectionUtils;

import java.time.LocalDateTime;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.concurrent.CopyOnWriteArrayList;
import java.util.stream.Collectors;

@Service
@Slf4j
public class OrderServiceImpl implements OrderService {

    @Autowired
    private OrderMapper orderMapper;

    @Autowired
    private OrderDetailMapper orderDetailMapper;

    @Autowired
    private AddressBookMapper addressBookMapper;

   @Autowired
   private ShoppingCartMapper shoppingCartMapper;

   @Autowired
   private WebSocketServer webSocketServer;

    /*
     * @Description  用户下单
     * @Param [ordersSubmitDTO]
     * @return com.sky.vo.OrderSubmitVO
     **/
    @Override
    @Transactional
    public OrderSubmitVO submitOrder(OrdersSubmitDTO ordersSubmitDTO) {
//        处理各种业务异常(地址簿为空,购物车数据为空)
        AddressBook address= addressBookMapper.getById(ordersSubmitDTO.getAddressBookId());
        if (address==null){
            throw new AddressBookBusinessException(MessageConstant.ADDRESS_BOOK_IS_NULL);
        }

//        查询当前用户的购物车
        Long userId = BaseContext.getCurrentId();
        ShoppingCart shoppingCart=new ShoppingCart();
        shoppingCart.setUserId(userId);
        List<ShoppingCart> list = shoppingCartMapper.list(shoppingCart);
        if (list==null && list.size()==0){
            throw new ShoppingCartBusinessException(MessageConstant.SHOPPING_CART_IS_NULL);
        }

//        向订单表插入一条数据
        Orders orders=new Orders();
        BeanUtils.copyProperties(ordersSubmitDTO,orders);
        orders.setUserId(userId);
        orders.setOrderTime(LocalDateTime.now());
        orders.setPayStatus(Orders.UN_PAID);
        orders.setStatus(Orders.PENDING_PAYMENT);
        orders.setNumber(String.valueOf(System.currentTimeMillis()));
        orders.setPhone(address.getPhone());
        orders.setConsignee(address.getConsignee());
        orders.setAddress(address.getProvinceName() + address.getCityName()  + address.getDistrictName() + address.getDetail());

        orderMapper.insert(orders);

//        向订单明细表插入n条数据
        List<OrderDetail> orderDetails=new ArrayList<>();
        for (ShoppingCart cart : list) {
            OrderDetail orderDetail=new OrderDetail(); // 订单明细
            BeanUtils.copyProperties(cart,orderDetail);
            orderDetail.setOrderId(orders.getId()); //设置当前订单明细关联的订单id
            orderDetails.add(orderDetail);
        }
        orderDetailMapper.insertBatch(orderDetails);

//        清空购物车
        shoppingCartMapper.deleteByUserId(userId);

//        封装vo返回结果
        OrderSubmitVO orderSubmitVO = OrderSubmitVO.builder()
                .id(orders.getId())
                .orderAmount(orders.getAmount())
                .orderTime(orders.getOrderTime())
                .orderNumber(orders.getNumber())
                .build();

        return orderSubmitVO;
    }

    /**
     * 订单支付
     *
     * @param ordersPaymentDTO
     * @return

    public OrderPaymentVO payment(OrdersPaymentDTO ordersPaymentDTO) throws Exception {
        // 当前登录用户id
        Long userId = BaseContext.getCurrentId();
        User user = userMapper.getById(userId);

        //调用微信支付接口，生成预支付交易单
        JSONObject jsonObject = weChatPayUtil.pay(
                ordersPaymentDTO.getOrderNumber(), //商户订单号
                new BigDecimal(0.01), //支付金额，单位 元
                "苍穹外卖订单", //商品描述
                user.getOpenid() //微信用户的openid
        );

        if (jsonObject.getString("code") != null && jsonObject.getString("code").equals("ORDERPAID")) {
            throw new OrderBusinessException("该订单已支付");
        }

        OrderPaymentVO vo = jsonObject.toJavaObject(OrderPaymentVO.class);
        vo.setPackageStr(jsonObject.getString("package"));

        return vo;
    }
     */

    /**
     * 支付成功，修改订单状态
     *
     * @param outTradeNo
     */
    public void paySuccess(String outTradeNo) {

        // 根据订单号查询订单
        Orders ordersDB = orderMapper.getByNumber(outTradeNo);

        // 根据订单id更新订单的状态、支付方式、支付状态、结账时间
        Orders orders = Orders.builder()
                .id(ordersDB.getId())
                .status(Orders.TO_BE_CONFIRMED)
                .payStatus(Orders.PAID)
                .checkoutTime(LocalDateTime.now())
                .build();

        orderMapper.update(orders);

        Map map=new HashMap();
        map.put("type",1); // 1表示来电提醒, 2表示客户催单
        map.put("orderId", ordersDB.getId());
        map.put("content","订单号："+outTradeNo);
        String json = JSON.toJSONString(map);
        webSocketServer.sendToAllClient(json);

    }

    /*
     * @Description  用户端订单分页查询
     * @Param [page, pageSize, status]
     * @return com.sky.result.PageResult
     **/
    @Override
    public PageResult pageQuery(Integer page, Integer pageSize, Integer status) {
//        设置分页
        PageHelper.startPage(page,pageSize);

        OrdersPageQueryDTO ordersPageQueryDTO = new OrdersPageQueryDTO();
        ordersPageQueryDTO.setStatus(status);
        ordersPageQueryDTO.setUserId(BaseContext.getCurrentId());
//        设置分页条件
        Page<Orders> pageInfo = orderMapper.pageQuery(ordersPageQueryDTO);

        List<OrderVO> orderVOList = new ArrayList<>();

//        查询出订单明细,并封装到orderVO中
        if (pageInfo !=null && pageInfo.size()!=0){
            for (Orders orders : pageInfo) {
                Long ordersId = orders.getId(); //订单id
//                查询订单明细
              List<OrderDetail> orderDetails=orderDetailMapper.getByOrderId(ordersId);
              OrderVO orderVO = new OrderVO();
              BeanUtils.copyProperties(orders,orderVO);
              orderVO.setOrderDetailList(orderDetails);
              orderVOList.add(orderVO);
            }
        }
        return new PageResult(pageInfo.getTotal(),orderVOList);
    }

    /**
     * 用户端订单详情查询
     * @param id
     * @return
     */
    @Override
    public OrderVO getOrderDetail(Long id) {
       Orders orders=orderMapper.getById(id);
       OrderVO orderVO=new OrderVO();
       BeanUtils.copyProperties(orders,orderVO);
       if (orders!=null){
           List<OrderDetail> orderDetails=orderDetailMapper.getByOrderId(id);
           orderVO.setOrderDetailList(orderDetails);
       }
        return orderVO;
    }

    /*
     * @Description  取消订单
     * @Param [id]
     * @return void
     **/
    @Override
    public void UserCancelById(Long id) {
        Orders orders = orderMapper.getById(id);
        if (orders==null){
            throw new OrderBusinessException(MessageConstant.ORDER_NOT_FOUND);
        }
//      订单状态 1待付款 2待接单 3已接单 4派送中 5已完成 6已取消
        if (orders.getStatus()>2){
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }

//        订单处于待接单状态下取消,则需要退款
        if (orders.getStatus().equals(orders.TO_BE_CONFIRMED)){
            orders.setPayStatus(orders.REFUND);
        }
        orders.setStatus(orders.CANCELLED);
        orders.setCancelReason("用户取消");
        orderMapper.update(orders);


    }

    /**
     * 再来一单
     * @param id
     */
    @Override
    public void repetition(Long id) {
//        查询当前用户id
        Long userId = BaseContext.getCurrentId();
//        根据订单id查询当前订单详情
        List<OrderDetail> orderDetails = orderDetailMapper.getByOrderId(id);
//        将订单详情转换为购物车数据
        List<ShoppingCart> shoppingCarts=orderDetails.stream().map(x -> {
            ShoppingCart shoppingCart=new ShoppingCart();
            BeanUtils.copyProperties(x,shoppingCart,"id");
            shoppingCart.setUserId(userId);
            shoppingCart.setCreateTime(LocalDateTime.now());
            return shoppingCart;
        }).collect(Collectors.toList());
//       将购物车对象批量插入数据库
        shoppingCartMapper.insertBatch(shoppingCarts);
    }

    /*
     * @Description  订单搜索
     * @Param [ordersPageQueryDTO]
     * @return com.sky.result.PageResult
     **/
    @Override
    public PageResult conditionSearch(OrdersPageQueryDTO ordersPageQueryDTO) {
        PageHelper.startPage(ordersPageQueryDTO.getPage(), ordersPageQueryDTO.getPageSize());
        Page<Orders> page = orderMapper.pageQuery(ordersPageQueryDTO);
//        部分订单状态需要额外返回订单菜品信息,将orders转换为orderVO
        List<OrderVO> orderVOList=getOrderVOList(page);
        return new PageResult(page.getTotal(),orderVOList);
    }



    // 需要返回订单菜品信息，自定义OrderVO响应结果
    private List<OrderVO> getOrderVOList(Page<Orders> page) {
        List<OrderVO> orderVOList=new ArrayList<>();

        List<Orders> ordersList=page.getResult();
        if (!CollectionUtils.isEmpty(ordersList)){
//          将共同字段复制到orderVO
            for (Orders orders : ordersList) {
                OrderVO orderVO=new OrderVO();
                BeanUtils.copyProperties(orders,orderVO);
                String orderDishes=getOrderDishesStr(orders);
//              将订单菜品信息封装到orderVO中，并添加到orderVOList
                orderVO.setOrderDishes(orderDishes);
                orderVOList.add(orderVO);
            }
        }
        return orderVOList;
    }

    /*
     * @Description  根据订单id获取菜品信息字符串
     * @Param [orders]
     * @return java.lang.String
     **/
    private String getOrderDishesStr(Orders orders) {
       List<OrderDetail> orderDetailList = orderDetailMapper.getByOrderId(orders.getId());
       List<String> orderDishesList = orderDetailList.stream().map(x->{
           String orderDishes=x.getName()+"*"+x.getNumber()+"份";
           return orderDishes;
        }).collect(Collectors.toList());
       return String.join(",",orderDishesList);
    }

    /*
     * @Description  根据状态统计订单数量
     * @Param []
     * @return com.sky.vo.OrderStatisticsVO
     **/
    @Override
    public OrderStatisticsVO statistics() {
        // 根据状态，分别查询出待接单、待派送、派送中的订单数量
        Integer toBeConfirmed = orderMapper.countStatus(Orders.TO_BE_CONFIRMED);
        Integer confirmed = orderMapper.countStatus(Orders.CONFIRMED);
        Integer deliveryInProgress = orderMapper.countStatus(Orders.DELIVERY_IN_PROGRESS);

        OrderStatisticsVO orderStatisticsVO = new OrderStatisticsVO();
        orderStatisticsVO.setToBeConfirmed(toBeConfirmed);
        orderStatisticsVO.setConfirmed(confirmed);
        orderStatisticsVO.setDeliveryInProgress(deliveryInProgress);
        return orderStatisticsVO;
    }

    /*
     * @Description  接单
     * @Param [ordersConfirmDTO]
     * @return void
     **/
    @Override
    public void confirm(OrdersConfirmDTO ordersConfirmDTO) {
        Orders orders = Orders.builder()
                .id(ordersConfirmDTO.getId())
                .status(Orders.CONFIRMED)
                .build();
        orderMapper.update(orders);
    }

    /*
     * @Description  拒单
     * @Param [ordersRejectionDTO]
     * @return void
     **/
    @Override
    public void rejection(OrdersRejectionDTO ordersRejectionDTO) {
        Orders orderDB = orderMapper.getById(ordersRejectionDTO.getId());
        // 订单只有存在且状态为2（待接单）才可以拒单
        if (orderDB==null && !orderDB.getStatus().equals(Orders.TO_BE_CONFIRMED)){
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }
        Integer status = orderDB.getPayStatus();
        Orders orders=new Orders();
        if (status==Orders.PAID){
            //用户已支付，需要退款
            orders.setPayStatus(Orders.REFUND);
        }

//     拒单需要退款，根据订单id更新订单状态、拒单原因、取消时间
        orders.setId(orderDB.getId());
        orders.setStatus(Orders.CANCELLED);
        orders.setRejectionReason(ordersRejectionDTO.getRejectionReason());
        orders.setCancelTime(LocalDateTime.now());

        orderMapper.update(orders);
    }

    /**
     * 商家取消订单
     * @param ordersCancelDTO
     */
    @Override
    public void cancel(OrdersCancelDTO ordersCancelDTO) {
        Orders ordersDB = orderMapper.getById(ordersCancelDTO.getId());
        Orders orders = new Orders();
        if (ordersDB.getPayStatus()==1){
            orders.setPayStatus(Orders.REFUND);
        }
        orders.setId(ordersDB.getId());
        orders.setStatus(Orders.CANCELLED);
        orders.setRejectionReason(ordersCancelDTO.getCancelReason());
        orders.setCancelTime(LocalDateTime.now());

        orderMapper.update(orders);
    }

    /*
     * @Description  派单
     * @Param [id]
     * @return void
     **/
    @Override
    public void delivery(Long id) {
        Orders ordersDB = orderMapper.getById(id);
        if (ordersDB == null || !ordersDB.getStatus().equals(Orders.CONFIRMED)){
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }
        Orders orders=new Orders();
        orders.setId(ordersDB.getId());
        orders.setStatus(Orders.DELIVERY_IN_PROGRESS);
        orderMapper.update(orders);

    }

    /*
     * @Description  完成订单
     * @Param [id]
     * @return void
     **/
    @Override
    public void complete(Long id) {
        Orders ordersDB = orderMapper.getById(id);
        if (ordersDB == null || !ordersDB.getStatus().equals(Orders.DELIVERY_IN_PROGRESS)){
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }
        Orders orders=new Orders();
        orders.setId(ordersDB.getId());
        orders.setStatus(Orders.COMPLETED);
        orders.setDeliveryTime(LocalDateTime.now());
        orderMapper.update(orders);
    }

    /*
     * @Description  客户催单
     * @Param [id]
     * @return void
     **/
    @Override
    public void reminder(Long id) {
//        根据id查询订单
        Orders orderDB = orderMapper.getById(id);
//        校验订单是否存在
        if (orderDB==null){
            throw new OrderBusinessException(MessageConstant.ORDER_NOT_FOUND);
        }

        Map map=new HashMap();
        map.put("type",2);  // 2表示客户催单
        map.put("orderId",id);
        map.put("content","订单号："+orderDB.getNumber());

//        通过websocket向客户端推送消息
        webSocketServer.sendToAllClient(JSON.toJSONString(map));

    }
}
